{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745822431",
    "entityType": "Track",
    "nonce": "1789850961472002737",
    "signature": "0x2e6ad983116e67d717ccfd803640149175e498b25326f18eb3b2e5c9723af561405b5e034ba463a1ad15c221698430c4403d018ffa9e62537c839ba0af873c631c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}